JavaScript News

Travels v1.0 – A 10x faster undo/redo library using JSON Patches instead of snapshots

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billboard.js 3.18.0: Arc annotations, per-group normalization & enhanced treemap labels

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[AI] Syntux - build generative UIs for the web.

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[AI] Webhook Testing Suite for Developers

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Localspace v1.0 – A modern localForage alternative with TypeScript and 6x faster batch ops

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Formbase: open‑source backend for HTML forms

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SVAR React v2.4: extended UI library, super-fast datagrid & Gantt chart

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I used a generator to build a replenishable queue.

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Stop turning everything into arrays (and do less work instead)

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[Ask EchoJS] Feelings on AI generated tools/content.

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[AI] Atrion – Deterministic Traffic Orchestration Using Physics (Node.js)

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Mobile device shake detection

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Interactive app to take a look at how you spend your time.

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AudioQ: Multi-channel audio queue management for browsers

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OpenChaos - A self-evolving codebase where community votes decide what gets merged

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Streaming JSON in just 200 lines of JavaScript

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CudaText: A Native VSCode Alternative That Nobody Knows

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Table and Cards views with animated transitions on sorting, switching view, and browser resizing (no dependencies, just vanilla Javascript, CSS, and HTML).

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Designing type-safe sync/async mode support in TypeScript

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The final nail in the HTML5 document outline coffin

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New HackerOne Signal Requirement for Vulnerability Reports

A big week for jQuery

#​769 — January 20, 2026 Read on the Web JavaScript Weekly jQuery 4.0 Released — 20 years on from its original release, the ever-popular (in terms of actual usage) library reac...

Node.js 25.4.0 (Current)

Mitigating Denial-of-Service Vulnerability from Unrecoverable Stack Space Exhaustion for React, Next.js, and APM Users

Node.js 22.22.0 (LTS)

Node.js 25.3.0 (Current)

Node.js 24.13.0 (LTS)

Node.js 20.20.0 (LTS)

Can we ever fix the web dependency mess?

#​768 — January 13, 2026 Read on the Web JavaScript Weekly Web Dependencies are Broken; Can We Fix Them? — Lea, who has worked at the heart of Web Standards for years, delivers...

Tuesday, January 13, 2026 Security Releases

A new JavaScript engine from Fabrice Bellard

#​767 — January 6, 2026 Read on the Web 🎉 Happy New Year. JavaScript Weekly is now landing in your inboxes on Tuesdays, so here we are! Let's see what 2026 brings.__Your editor, Peter Cooper...

The JavaScript Bundler Grand Prix

#​766 — December 19, 2025 Read on the Web 🗓️ As it's the last issue of 2025, a reminder that JavaScript Weekly moves to Tuesdays in January. See you again on January 6, 2026!__Your editor, Peter Co...

Denial of Service and Source Code Exposure in React Server Components

Security researchers have found and disclosed two additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability. High vulnerabilit...

Node.js 24.12.0 (LTS)

Critical Security Vulnerability in React Server Components

There is an unauthenticated remote code execution vulnerability in React Server Components. A fix has been published in versions 19.0.1, 19.1.2, and 19.2.1. We recommend upgrading immediately.

Node.js 20.19.6 (LTS)

Node.js 25.2.1 (Current)

Node.js 24.11.1 (LTS)

Node.js 25.2.0 (Current)

Node.js 25.1.0 (Current)

Node.js 22.21.1 (LTS)

Node.js 24.11.0 (LTS)

Node.js v22 to v24

Node.js v20 to v22

Node.js v14 to v16

Node.js v12 to v14

React Conf 2025 Recap

Last week we hosted React Conf 2025, in this post, we summarize the talks and announcements from the event...

React Compiler v1.0

We are releasing the compiler's first stable release today.

Introducing the React Foundation

Today, we're announcing our plans to create the React Foundation a new technical governance structure

React 19.2

React 19.2 adds new features like Activity, React Performance Tracks, useEffectEvent, and more.

React Labs: View Transitions, Activity, and more

In React Labs posts, we write about projects in active research and development. In this post, we're sharing two new experimental features that are ready to try today, and updates on other areas we're...

Sunsetting Create React App

Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework, or to migrate to a build tool like Vite, Parcel, or RSBuild. We’re also providing docs...

React v19

React 19 is now available on npm! In this post, we'll give an overview of the new features in React 19, and how you can adopt them.

React Compiler Beta Release

At React Conf 2024, we announced the experimental release of React Compiler, a build-time tool that optimizes your React app through automatic memoization. In this post, we want to share what's next f...

React Conf 2024 Recap

Last week we hosted React Conf 2024, a two-day conference in Henderson, Nevada where 700+ attendees gathered in-person to discuss the latest in UI engineering. In this post, we'll summarize the talks...

React 19 Upgrade Guide

The improvements added to React 19 require some breaking changes, but we've worked to make the upgrade as smooth as possible and we don't expect the changes to impact most apps. In this post, we will...

React Labs: What We've Been Working On – February 2024

In React Labs posts, we write about projects in active research and development. We’ve made significant progress since our last update, and we’d like to share our progress.

React Canaries: Enabling Incremental Feature Rollout Outside Meta

We'd like to offer the React community an option to adopt individual new features as soon as their design is close to final, before they're released in a stable version--similar to how Meta has long u...

React Labs: What We've Been Working On – March 2023

In React Labs posts, we write about projects in active research and development. We've made significant progress on them since our last update, and we'd like to share what we learned.

Introducing react.dev

Today we are thrilled to launch react.dev, the new home for React and its documentation. In this post, we would like to give you a tour of the new site.

React Labs: What We've Been Working On – June 2022

React 18 was years in the making, and with it brought valuable lessons for the React team. Its release was the result of many years of research and exploring many paths. Some of those paths were succe...

React v18.0

React 18 is now available on npm! In our last post, we shared step-by-step instructions for upgrading your app to React 18. In this post, we'll give an overview of what's new in React 18, and what it...

How to Upgrade to React 18

As we shared in the release post, React 18 introduces features powered by our new concurrent renderer, with a gradual adoption strategy for existing applications. In this post, we will guide you throu...

React Conf 2021 Recap

Last week we hosted our 6th React Conf. In previous years, we've used the React Conf stage to deliver industry changing announcements such as React Native and React Hooks. This year, we shared our mul...